car bucks and hesitates at 14.0 and leaner in vacuum- thats not cool
04-26-2005, 11:33 AM
#1
0.5 BAR
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Join Date: Feb 2004
Posts: 198
car bucks and hesitates at 14.0 and leaner in vacuum- thats not cool
in vacuum my car bucks very slightly when my a/f goes any leaner than 14.0-14.1ish. it doesnt happen all the time, but its starting to become annoying. now im gonna richen it up and cure the problem, but theoretically if my o2 was enabled shouldnt i be running at close to stoich anyway with no driveability issues? could it be ignition related like my plugs are fouled?? car runs flawlessly otherwise
04-26-2005, 02:07 PM
#3
0.5 BAR
Thread Starter
Join Date: Feb 2004
Posts: 198
Re: car bucks and hesitates at 14.0 and leaner in vacuum- thats not cool
Originally Posted by xenocron
Need more information like...
Engine Management
Setup
...---- is this even a honda?
Engine Management
Setup
...---- is this even a honda?
97 b18b, uberdata, rc 440's, stock pump (but i dont go lean in boost), t3/t4 57 trim holding a steady .5 bar. im also using an lm-1 as my wideband.
xenocron, im actually using a map i found on your website(i made a few small changes, like lean out the idle) that made 225/197 i believe on the same motor/turbo setup as i have.
04-26-2005, 02:36 PM
#4
3.0 BAR
Join Date: Jul 2003
Posts: 6,449
Re: car bucks and hesitates at 14.0 and leaner in vacuum- thats not cool
Well if it happens EVERYTIME your wideband goes leaner than 14.1 then I say your Wideband is off...
If it only happens in certain spots on the map, I would say you have mechanical issues.
Does your car idle well?
If it only happens in certain spots on the map, I would say you have mechanical issues.
Does your car idle well?
04-26-2005, 04:00 PM
#5
0.5 BAR
Thread Starter
Join Date: Feb 2004
Posts: 198
Re: car bucks and hesitates at 14.0 and leaner in vacuum- thats not cool
my car idles well, at about 900-1000 rpm. idle a/f is high 13's (although as soon as i come to idle it goes high 16's, then takes 1 to 1.5 seconds to drop back down.). i was thinking the wideband sensor is possibly off, but it did a free air calibration and its reading 20.9% o2 in the atmosphere, and i think the real % of oxygen is about 21, so its close.....the sensor has few hundred miles on it tops.
id say it happens maybe 25% of the time im running the 14 a/f ratio, which is mainly around 11-14 vacuum. it is so hardly noticable my friends didnt know it was happening until they drove it
id say it happens maybe 25% of the time im running the 14 a/f ratio, which is mainly around 11-14 vacuum. it is so hardly noticable my friends didnt know it was happening until they drove it
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